# When heated, lithium reacts with nitrogen to form lithium nitride: 6Li(s) + N2(g) → 2Li3N(s)What is the theoretical yield of Li3N in grams when 12.1 g of Li is heated with 33.0 gof N2?  g If the actual yield of Li3N is 6.33 g, what is the percent yield of the reaction? %

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When heated, lithium reacts with nitrogen to form lithium nitride:

 6Li(s) + N2(g)  →  2Li3N(s)

What is the theoretical yield of Li3N in grams when 12.1 g of Li is heated with 33.0 g
of N2?

g

If the actual yield of Li3N is 6.33 g, what is the percent yield of the reaction?
%

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Step 1

Given:

Mass of Li = 12.1 g

Mass of N = 33 g

What is the theoretical yield of Li3N?

Step 2

Calculation:

Find the moles of Li and N2 :

Moles of Li = 12.1 / 6.9 mol = 1.7 mol.

Mol. Of N2 = 33 / 28 = 1.1 g

Observe the balanced equation,

6Li(s) + N2(g)→ 2Li3N(s)

As per the balanced equation above, 6 moles of Li react with 1 mol. Of N,

1.7 mol. Of Li needs --------? Mol. Of...

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